Soil disintegrating and sifting screen



Feb. 11, 1947. Fgr CRQSSLEY 2,415,675

SOIL DISINTEGRATING AND SIF'IING SCREEN Filed March 16, 1943Z'SheetS-Sheet l -Z 721 f4 l n@ l r INV NTOR.

/ ATTORNEY Feb. 11, 1947. R H, ROSSLEY 2,415,675

SOIL DISINTEGRATING AND SIFTING SCREEN Filed March 16, 1943 2Sheets-Sheet 2 f d i c2 W W 7 U C) l) C3 W .w1 1b lNVE OR ATTORNEYS.

Patented Feb. l1, 1947 SQIL DISINTEGRATING AND SEFTING SCREEN Robert H.Crossley, Mansfield, Pa.

Application March 16, 1943, Serial No. 479,384

2 Claims.

This invention relates to improvements in apparatus for disintegratingand sifting materials, such as soil.

The primary object of this invention is the provision of a relativelysimple and efficient type of soil sifter which is power operated for thepurpose of pulverizing and sifting soil to any desired size.

Other objects and advantages of this invention will be apparent duringthe course of the following detailed description.

In the accompanying drawings, forming a part of this specification, andwherein similar reference characters designate corresponding partsthruout the several views,

Figure 1 is a side elevation of the improved soil sifter.

Figure 2 is a fragmentary longitudinal cross sectional View taken thruthe soil sifter.

Figures 3 and 4 are transverse cross sectional views taken substantiallyon their respective lines on Figure 2 of the drawings.

Figure 5 is a cross sectional view showing a drive connection for thepower plant of the soil sifter.

Figure 6 is a fragmentary cross sectional view taken substantially onthe line 6 5 of Figure l.

Figure 7 is a fragmentary plan View showing the means of detachablysupporting a 'screen in the sifter box.

Figures 8 and 9 are cross sectional views showing modied types ofsifters.

In the drawings, wherein for the purpose of illustration are shownpreferred and modified forms of the invention, the letter A maygenerally designate the soil ysifting apparatus. It consists of thesupporting frame B; shaker Ibox C; screen D for the shaker box; drivemeans E for the shaker box, and soil breaking and pulverizing means F.

The framework B preferably consists of a substantiallyrectangular-shaped table frame consisting of longitudinal side membersit) and end members il supported by legs i2 in a quadrangulararrangement. The frame pieces I0 and I! may be additicnallsT braced uponthe legs I2 by brackets i3 in any approved arrangement.

The shaker box C preferably consists of side rails or walls 2S and 2l,and end walls 22 and 2t. These walls are preferably provided with insidescreen supporting rails at the bottom of the shaker box for detachablysupporting the screen D.

The screen D may of course be of any'desired mesh and it consists of ascreen body secured to end and side rails 3l, as shown in the drawings.The screen supporting rails 25 of the shaker box are additionally bracedby diagonally crossed screen supporting members 33, shown in- Figure 'lof the drawings.

The end wall 23 0f the shaker box may be of metal and, if desired, itmay be pivoted at 4i! so as to provide an eincient means for preventingshaking of the earth out of the box, and for ready access t0 the screenC. It may be arcuated and extend from the extreme end of the shaker boxup to the point of the beater mechanism F, to be subsequently described.

sloping walls i5 may extend along the shaker box at one end and for adistance of over half the length thereof, in a funnel-shaped arrangementto permit of piling of the earth sufficiently in the shaker box and uponthe screen in advance of the beater mechanism F.

It is intended to give the shaker box a reciprocatory motion. To thatend, it is mounted upon the side rails l0 of the supporting framework Bin a novel manner, so as to give the earth a forward movement upon thescreen incident to the motion of the shaker box. Thus, the side wallsZtl and 2l at their forward ends are pivotally connected to the siderails I0 ofthe supporting frame B by means of links which are shown indetail in Figure 4 of the drawings as having pivot connections 5l and 52with the shaker box and frame respectively. At their rear ends the walls2i) and 2i are likewise connected to the rails ill of the frame by meansof similar pivot links 53, which` have pivot connections 54 and 55 withthe shaker box and frame respectively. These pivot links 5d and 53 areso related that the shaker box during its forward motion is elevatedslightly at its rear end and lowered slightly at its front end i. e.from a normal horizontal position. rlhus the soil will be given aforward motion during reciprocation of the shaker box for the purpose offeeding it towards the beater mechanism To that end the link Eil may beinclined upwardly and rearwardly and the link 53 inclined upwardly andforwardly, as shown in Figures 1 and 2 of the drawings.

The driving means E preferably consists of a motor or other prime mover6l! suitably mounted at E! upon the frame C. At the rear end the frameprovides a table or wall 62 upon which a shaft 63 is rotatably mountedupon standards 6d, shown in Figure 5. The shaft of the motor isconnected to the shaft 63 for driving the latter by means of a belt andpulley arrangement B5. The shaft 63 is provided with an eccentric 66having a connecting rod 61' swivelly connected at 68 with the shakerbox, as shown in Figure 2 of the drawings. The rapidity of shaker actionof the box C of course depends upon the speed of the motor and the ratioof its drive with respect to the pulley.

The earth beating and pulverizing mechanism Fis located forwardly on theshaker box, over the screen. It preferably consists of two sets ofintermeshing beaters alternately operated with both the forward andrearward motions of the shaker box so as to provide an efficient andcontinuous beater action with an equalization of the forces placed uponthe power drive. Thus, a set of preferably L-shaped metal beaters 'l0are pivotally mounted upon a xed shaft 1i; the latter being supported atits ends upon uprights I2 carried by the frame rails l0, as shown inFigure 3 of the drawings. At their upper ends these uprights 12 may havea connecting wall I3 located over the beaters, which not only serves inreinforcing the mounting of the uprights 12, but also acts as a coverfor preventing throwing of the soil incident to the beater and shakeraction. These beaters 19 are provided with preferably fiat beater feetwhich at one position lie parallel over the screen. as shown in Figure2. The complimentary set of beaters 19 are shaped similar to the beaters'l0 and mounted upon a shaft T9 supported similar to the shaft 'H Theside walls 20 and 2i of the shaker box are provided with beateroperating rods 99 and 9i for the sets of beaters i and 18 respectively.These rods 90 and 9i are so positioned upon the shaker box with respectto the pivotal mounting of the beaters that the rod 90 will move thebeaters 'l0 upwardly during forward movement of the shaker box andpermit the lowering of said beaters 'l0 during rearward movement of theshaker box. The action of the beaters 18 is directly counter to actionof the beaters 19, so that it can be seen the beating action of thebeaters takes place upon the earth during both forward and rearwardmotions of the shaker box. In theform of beaters 'I0 and 'I8 shown inFigure 2, each beater is provided with a spring supporting pin i90mounted upon. the shaft 90 or 9|, as the case may be; the spring I9!mounted thereon normally tending to urge the beater towards itsrespective rod 90 or 9|, as the case may be. During the upward motionthe action of the rods attached to the shaker box upon the beater ispositive and will lift the beater. During the lowering motion of thebeater, the beater need not necessarily follow the operating rods 90 or9i, since the beater will be operating upon a bulk of earth beneath thebeaters foot,.but the action of the spring 40| is such as to tend tomove the beater foot in a tamping relation upon the earth therebeneath.

Screen D is held in place by spring operated retractable pins |05, suchas shown in Figure 6 of the drawings.

The form of beater construction shown in Figure 8 includes heavy beatersor pulverizers 'Hiab and 'I8a which swing into position for puiverizingthe earth, as an incident of their weight.

InFigure 9 a further modified form of beater construction is shownconsisting of beaters 'I0b and 'Ib of J-shaped formation, which areprovided with a common shaft H0 having pins H19a and springs l 01a whichfunction at the free ends of the beaters in a manner similar to thesprings |00 and IUI above described for the preferred form of beateraction.

For both of the modified forms of invention shown in Figures 8 and 9,removable and immovable rods for mounting and actuating the beaters havebeen given the same reference characters as given for the preferred formof beater action shown in Figure 2, and their action and function arethe same as for the preferred form of the invention.

The operation of the soil sifter will be apparent from the foregoing.The soil is dumped in the rear portion of the sifter box and as anincident of the reciprocatory and slight rocking action of the sifterbox, the soil is moved slowly but progressively forward upon the screenuntil it encounters the action of the beaters. It is there acted uponfor pulverizing or otherwise reducing the same to the proper size forsifting thru the screen.

Various changes in the shape, size and arrangement of parts may be madeto the form of invention herein shown and described, without departingfrom the spirit of the invention or the scope of the following claims.

I claim:

1. In a soil disintegrator and sifting screen, the combination of asupporting frame, a movable soil sifter, including a receptacle and ascreen; soil beater means pivotally mounted upon the frame and extendinginto said receptacle and entirely across said screen; means carried bythe receptacle for actuating said beater means as an incidentof movementof the receptacle relative to the frame, comprising a rigid memberextending transversely across said receptacle, with said soil beatermeans disposed within the path of travel of said rigid member; andspring means for normally urging the soil beater means into asoil-comminuting relationship with respect to the screen and toward therigid member.

2. In a classifying and separating device the combination of asupporting frame, a sifter receptacle movably mounted upon the frame,material engaging means cooperatively disposed within the receptacle atone end thereof for the purpose of enhancing screening action anddisintegration of the material, comprising two sets of movably mountedintermeshing members, each set being mounted upon a separate pivot, themembers of one set being disposed in alternating relation with themembers of the other set transversely across the receptacle, and meanscausing one set to oscillate on its pivot in one direction while theother set oscillates on its pivot in the opposite direction.

ROBERT H. CROSSLEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 906,529 Hyde Dec. 15, 19081,286,389 Mullen Dec. 3, 1918 545,581 Davidson Sept. 3, 1895 2,020,800Royer Nov. 12, 1935 1,915,539 Kratz June 27, 1933 670,087 Stedman Mar.19, 1901 1,415,598 Magnuson May 9, 1922 268,762 Williams Dec. 5, 1882740,194 Smith Sept, 29, 1903 27,191 Lukens Feb. 14, 1860

